Appendix
817
4.
User B accepts the call from User C.
F9. INVITE A
F11. 180 Ringing
F20. 200 OK
F1. INVITE B
F3. 180 Ringing
F5. 200 OK
F7. ACK
User A
User B
User C
Proxy Server
F2. INVITE B
F4. 180 Ringing
F6. 200 OK
F8. ACK
F10. INVITE A
F12. 180 Ringing
F13. INVITE B ( sendonly )
F15. 200 OK
F316 200 OK
F17. ACK
F18. ACK
F19. 200 OK
F21. ACK
F22. ACK
F14. INVITE B ( sendonly )
2-way RTP channel established
No RTP Packets being sent
2-way RTP channel established
Step
Action
Description
F1
INVITE—User A to Proxy Server
User A sends an INVITE message to a proxy
server. The INVITE request is an invitation to
User B to participate in a call session.
In the INVITE request:
The IP address of User B is inserted in
the Request-URI field.
User A is identified as the call session
initiator in the From field.
Summary of Contents for CP969
Page 1: ......
Page 22: ...Administrator s Guide for SIP T5 Series Smart Media Phones xxii ...
Page 30: ...Administrator s Guide for SIP T5 Series Smart Media Phones 8 ...
Page 474: ...Administrator s Guide for SIP T5 Series Smart Media Phones 452 ...
Page 781: ...Troubleshooting 759 The phone begins rebooting Any reboot of the phone may take a few minutes ...
Page 787: ...Troubleshooting 765 information on capturing packets refer to Capturing Packets on page 735 ...
Page 788: ...Administrator s Guide for SIP T5 Series Smart Media Phones 766 ...
Page 864: ...Administrator s Guide for SIP T5 Series Smart Media Phones 842 ...